What is an invasive alien species?
An invasive alien species is a plant, animal, or microorganism introduced outside its natural range, whose establishment or spread may threaten the environment, the economy, or society.
Some of these species reproduce and spread rapidly. In particular, they can displace native species, alter natural habitats, and disrupt the functioning of ecosystems.
The consequences
Invasive alien species pose a threat to biodiversity. In a new ecosystem, they can compete with, parasitize, or prey on native species, or even hybridize with them. Their introduction is often difficult, if not impossible, to reverse.
Their impacts also affect the economy and society, particularly through the costs associated with controlling them, damage to agricultural and forestry activities, risks to human health, and restrictions on certain recreational activities.
Learn more
To view the list of the most widely recognized invasive alien species (flora and fauna) in Quebec:
- Sentinelle (french)
To help you prevent the introduction and spread of invasive alien species:
Some examples of invasive alien species
If you think you’ve spotted an invasive alien species or would like advice on best practices to prevent its spread, please contact the Green Line. Our eco-technician can provide you with information and guidance on the steps you can take to protect the biodiversity of our territory.